package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.w3c.dom.ls.LSInput;

import java.util.ArrayList;
import java.util.List;


@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;


    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品和口味数据
     *
     * @param dishDTO
     */
    @Override
    @Transactional //事物注解，保证方法的原子性
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        //向菜品表插入一条数据
        dishMapper.insert(dish);
        //获取Insert语句生成的主键值
        Long dishId = dish.getId();
        //向口味表插入n条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            //向口味表插入n条数据
            //批量插入菜品id
            for (DishFlavor dishFlavor : flavors) {
                dishFlavor.setDishId(dishId);
            }
            //批量插入口味数据,批量插入
            dishFlavorMapper.insertBeatch(flavors);
        }

    }

    @Override
    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> voPage = dishMapper.page(dishPageQueryDTO);
        PageResult pageResult = new PageResult();
        pageResult.setTotal(voPage.getTotal());
        pageResult.setRecords(voPage.getResult());
        return pageResult;

    }

    /**
     * 菜品批量删除
     */

    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否能够删除--》是否存在起售中的菜品
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                //当前菜品处于售卖中，不可以删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断当前菜品是否被套餐关联，如果当前菜品被某个套餐关联，则不能删除

        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            //菜品被套餐关联
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);

        }
        //删除菜品表中的菜品数据
        /*for (Long id : ids) {
            dishMapper.deleteById(id);
            //删除和菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }*/

        //根据菜品ID集合批量删除菜品数据

        dishMapper.deleteByIds(ids);
        //根据菜品ID集合批量删除关联的口味数据

        dishFlavorMapper.deleteByDishIds(ids);

    }

    /*
     * 根据id查询数据用于回显*/

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据菜品id查询菜品数据
        Dish dish = dishMapper.getById(id);
        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        //将查询的数据封装到DishVo中
        DishVO dishVO = new DishVO();
        //拷贝
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /*
     * 修改菜品数据和口味信息*/
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //修改菜品表基本信息
        dishMapper.update(dish);
        //删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            //向口味表插入n条数据
            //批量插入数据
            for (DishFlavor dishFlavor : flavors) {
                dishFlavor.setDishId(dishDTO.getId());
            }
            //批量插入口味数据,批量插入
            dishFlavorMapper.insertBeatch(flavors);
        }
    }

    @Override
    public void startOrstop(Integer status, Long id) {
        Dish dish = new Dish();
        dish.setStatus(status);
        dish.setId(id);
        dishMapper.update(dish);
    }

    @Override
    public List<Dish> list(Long categoryId) {
        return dishMapper.list(categoryId);

    }

    @Override
    public List<DishVO> listFlavos(Long categoryId) {
        //根据分类id查询菜品和口味
        //查询菜品，获得菜品id，根据菜品id获取口味信息,构建DishVo对象
        List<DishVO> dishVOList = new ArrayList<>();
        //菜品集合
        List<Dish> list = dishMapper.list(categoryId);

        for (Dish dish : list) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(dish,dishVO);
            Long dishId = dish.getId();
            //获取口味
            List<DishFlavor> dishdlavors = dishFlavorMapper.getByDishId(dishId);
            dishVO.setFlavors(dishdlavors);
            dishVOList.add(dishVO);
        }

      /*  List<DishVO> list = dishMapper.getDishandFlavos(categoryId);*/

        return dishVOList;
    }
}
